hot rolled seamless carbon steel pipe: 1.in carbon steel 2.size from 48-219* 4.5-40mm ... ,TP321,TP316,TP304L,TP316L,A335 P5,ST37,ST35.8,ST52,1.0309,OD1/4"-40",13mm-1000mmWTSCH5,SCH10,SCH20,SCH40,SCH60 ... ,Oil development ect.OD TolleranceD<50mm,+-0.5mm ,D>50MM,+-1%WT TolleranceWT +-12.5%ChemicalC:0.17-0.24%,Si ...